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Updated: Feb 7, 2026

Automating Aggregate Quantification in Caenorhabditis elegans
Published on: October 14, 2021
Osmolytes modulate polyglutamine aggregation in a sequence dependent manner
Itika Saha1,2, Virender Singh2, Gunasekhar Burra2
1Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany.
Abstract:
Osmolytes stabilize protein structure and suppress protein aggregation. The mechanism of how osmolytes impact polyglutamine (polyQ) aggregation implicated in Huntington's disease was studied. By using a reverse-phase chromatography assay, we show that methylamines-trimethylamine N-oxide and betaine are generic in enhancing polyQ aggregation, while a disaccharide trehalose and an amino acid citrulline moderately retard polyQ aggregation in a sequence specific manner. Despite the altered kinetics, the fundamental nucleation mechanism of polyQ aggregation and the nature of end stage aggregates remains unaffected. These results highlight the importance of using osmolytes as modulatory agents of polyQ aggregation.
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